Abstract: An apparatus for recovering and recycling refrigerant is provided. The apparatus includes a separation unit, a compressor, and a receiver tank. The separation unit is provided for condensing compressed refrigerant and for vaporizing contaminated refrigerant. The separation unit includes a multichamber structure having a high pressure region and a low pressure region. The high pressure region includes a high pressure inlet for providing compressed refrigerant vapor to the high pressure region, a high pressure outlet for removing condensed refrigerant from the high pressure region, and a compressor oil outlet for removing compressor oil from the high pressure region. The low pressure region includes a low pressure inlet for introducing contaminated refrigerant into the low pressure region, a low pressure outlet for removing vaporized refrigerant from the low pressure region, and a refrigerant oil outlet for removing refrigerant oil from the low pressure region.

Abstract: A portable welding unit comprising a housing. The housing contains a first battery and a second battery connected in series. Each of the batteries is a sealed, non-spillable battery. Each battery has a positive terminal and a negative terminal. The welding unit has a first clamp electrically connected to the positive terminal of the first sealed, non-spillable battery. The first clamp extends outside the housing and is adapted to be connected to a ground of an object to be welded. A welding gun is electrically connected to the negative terminal of the second sealed, non-spillable battery. The welding gun extends outside the housing. A wire feed mechanism is located in the housing and is connected to the battery for extending wire through the welding gun. A spool of consumable electrode wire is rotatably connected to the housing. This wire is supplied to the welding gun via the wire feed mechanism. In operation, the user connects the first clamp to ground.

Abstract: An injector for introducing a fluid composition into an air conditioning system is provided. The injector includes a pump including an internal volume having a first opening and a second opening, and a plunger which moves within the internal volume between a first position and a second position. The first opening includes a first valve for selectively allowing the fluid composition to flow from the internal volume as the plunger moves from the first position to the second position. The second opening includes a second valve for selectively allowing the fluid composition to flow into the internal volume as the plunger moves from the second position to the first position. A hose is provided having a first end connected to the first opening, and a second end constructed for attachment to a port on an air conditioning system. A cartridge including a fluid composition is provided fluidly connected to the second opening of the pump.

Abstract: A welder power supply configuration wherein the power supply includes a combined transformer and inductor assembly wherein the combined transformer and inductor assembly is comprised of a four-legged core, primary windings, secondary windings and inductor windings. The four-legged core includes isolation slits in the leg of the four-legged core shared by the inductor and transformer in order to isolate the magnetic flux of the inductor from the remaining lens in the four-legged core assembly.

Abstract: An apparatus for the treatment and recovery of spent vehicle coolant that involves the following steps:a) removing the spent coolant from the engine;b) treating the spent coolant with sodium dimethyldithiocarbamate to cause dissolved metals therein to form insoluble particles;c) treating the spent coolant of step b) with an aqueous basic coagulating agent such as a polyquaternary ammonium compound in its hydroxide form;d) filtering the spent coolant from step c) through a set of filters and then through a bed of carbon particles, to produce a relatively cleaner liquid; ande) adding to the relatively clear liquid a combination of corrosion inhibitors, buffering agents and alkali, whereby the treated coolant can be recycled to the vehicle for effective coolant performance therein.

Abstract: A process and apparatus for the treatment and recovery of spent vehicle coolant that involves the following steps:a) removing the spent coolant from the engine;b) treating the spent coolant with sodium dimethyldithiocarbamate to cause dissolved metals therein to form insoluble particles;c) treating the spent coolant of step b) with an aqueous basic coagulating agent such as a polyquaternary ammonium compound in its hydroxide form;d) filtering the spent coolant from step c) through a set of filters and then through a bed of carbon particles, to produce a relatively cleaner liquid; ande) adding to the relatively clear liquid a combination of corrosion inhibitors, buffering agents and alkali, whereby the treated coolant can be recycled to the vehicle for effective coolant performance therein.

Abstract: The invention concerns a power supply for an arc welder. A main transformer drives a plurality of secondaries. The invention provides a switching and control system that derives fully rectified power from the secondaries, at an adjustable duty cycle, and applies the power to a welding electrode. One advantage to using a plurality of secondaries is that each supplies part of the total electrode current. Thus, the rectification and duty-cycle control can be accomplished by individual devices (such as SCRs) which are distributed over the secondaries. The total cost of the individual devices can be less than the cost of a single device, of equivalent current capacity, used in a single secondary.